What type of device is described as being activated automatically when the driver turns off the ignition and removes the key?

The device described as being activated automatically when the driver turns off the ignition and removes the key is known as a passive device. Passive devices are those that operate without any direct action or intervention required from the user once they are initially set up. In the context of automotive safety, a passive device often refers to features such as airbags or anti-theft systems that engage automatically to protect the occupants of the vehicle upon an event, such as turning off the ignition.

In contrast, active devices require some form of user action to function, such as manually engaging a safety feature. Manual devices depend on the driver’s active participation, while static devices do not change state or engage in a usual operating manner, and thus do not fit the description provided. The automatic activation of the system upon turning off the ignition clearly aligns with the characteristics of passive devices, which emphasizes their primary function of providing safety or security without the need for immediate user input.